Employee Benefit Plans - Schedule of Assumptions Used (Details)	12 Months Ended
Sep. 30, 2023	Sep. 24, 2022	Sep. 25, 2021
Pension Benefits [Member]
Actuarial assumptions [Abstract]
Weighted-average discount rate used in calculating benefit obligations	5.50%	5.125%
Assumptions used in calculating benefit cost [Abstract]
Weighted-average discount rate	5.125%	2.50%	2.125%
Weighted-average expected long-term rate of return on plan assets	2.95%	2.15%	1.85%
Retiree Health and Life Benefits [Member]
Actuarial assumptions [Abstract]
Weighted-average discount rate used in calculating benefit obligations	5.375%	4.875%
Health care cost trend	5.33%	5.33%
Assumptions used in calculating benefit cost [Abstract]
Weighted-average discount rate	4.875%	1.75%	1.375%
Health care cost trend	5.33%	5.40%	5.72%

Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (k)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480506/715-20-50-1

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- Definition

Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan.

+ References

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- Definition

Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480506/715-20-50-8

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (k)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480506/715-20-50-1

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- Definition

Assumed rate, for next fiscal year, based on annual change in cost of health care cost benefits used to measure expected cost of benefits covered by defined benefit postretirement plan. Factors include, but are not limited to, estimate of health care inflation, change in health care utilization or delivery pattern, technological advances, and change in health status of participant. Excludes factors for change in composition of plan population by age and dependency status.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (l)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480506/715-20-50-1

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- Definition

Ultimate trend rate for health care cost for defined benefit postretirement plan.

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- References

No definition available.

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